有机氢载体低温高效脱氢催化剂的研究进展

有机氢化物储氢作为一种大规模、长距离、长期氢能储存和输送的储氢技术,应用潜力巨大,主要问题是常规脱氢催化剂在低温下的活性偏低和稳定性较差。在理论分析开发十氢化萘、甲基环己烷和环己烷等有机氢载体低温高效脱氢催化剂可行性的基础上,综述了国内外的研究现状。指出对传统脱氢催化剂进行改性、采用新型活性炭和覆炭γ-Al2O3载体,都可在一定程度上改善有机氢载体在低温下的脱氢效率;而反应蒸馏条件下催化剂以过热液膜状态催化,或采用pH摆动法制备孔分布集中且pH可控的γ-Al2O3作载体,则可能使有机氢载体在低温下高效脱氢,是有机氢载体高效脱氢催化剂的开发方向。

Development of Dehydrogenation Catalyst for Reversible Hydrogen Storage Based on Organic Hydrides

Hydrogen storage technique with organic hydrides,namely decalin,methylcyclohexane and cyclohexane,can be applied to store and transport hydrogen energy in large scale and long distance.The existent key problems are how to improve the low temperature activity and high temperature stability of dehydrogenation catalysts.In this paper,the progress in research of the dehydrogenation catalyst was reviewed and feasibility of developing high efficient dehydrogenation catalyst was analyzed.Dehydrogenation activity of the catalysts at low temperature can be improved by modification of traditional dehydrogenation catalyst and use of novel active carbon or carboncovered γ-Al2O3 as supports.By use of superheated liquid-film-type catalysis under reactive distillation conditions,or pore size distribution and pH controlled γ-Al2O3 as support prepared by the pH-swing method,highly efficient dehydrogenation of organic hydrogen carrier at low temperature would be realized.